Raytheon Beech Baron E55 - Page 625

Raytheon
Aircraft
Company
BARON
55
AND
58
SHOP
MANUAL
i.
Install the
small side
plate
aft of
the
engine
compartment
door;
then install the
upper
engine cowling.
j.
Close the
right
side
engine
compartment
door and
secure.
GENERATOR
BRUSH
WEAR
LIMITS
Generator
brushes
should
be
replaced
before
their
maximum
wear
limits
are
reached. The
minimum
permissible
brush
length
is
5/16
in..
I
VOL
TA
GE
REGULA TOR ADJUSTMENT
(GENERA
TOR S
YSTEM)
In those
airplanes
equipped
with
generators,
each
generator
is controlled
by
its
respective
voltage
regulator.
When
the
generator
is switched
into
the
circuit,
the
voltage regulator
will
automatically
adjust
the
output
of
the
generator
to
the
required
electrical
load,
including battery recharging.
The
individual
voltage
regulators
are
located
in
the
outboard
side
of each
nacelle
just
aft of
the
engine
firewall.
The
voltage regulators
utilized
on
the
airplanes
should be checked
and,
if
necessary,
adjusted
when
a
voltage
regulator
or
generator
is
replaced
or
when
a
periodic
inspection
reveals
a
need
for
adjustment.
The ideal
time
to
adjust
the
voltage
regulators
is
immediately
following
a
flight
of
20
to
30
minutes duration
or
longer,
in
which
normal
electrical loads
have
been used. If the
electrical
system,
including
the
voltage regulators
and
generators,
cannot
be
warmed
up
by
flight, they
may
be
warmed
up
on
the
ground.
WARNING:
Exercise
extreme
caution
to
avoid
personal
injury
from
the
moving propeller
or
prop
wash
while
adjusting
the
voltage
regulators.
The
following
procedures
should be used
to
adjust
the
voltage regulators:
CAUTION:
During
all
tests
and
adjustments
on
the
voltage
regulators,
make
certain
that the
regulator
circuits,
including
any
meter
or
test
leads,
are
always
protected
from
accidental
grounding
to
airplane
structure
and
contact
with other circuits. Even
a
momentary
ground
contact
may
permanently
damage
the
voltage
regulators.
a.
Start
the
left
and
right engines according
to
the
ENGINE START
procedures
in the
applicable
Pilot’s
Operating
Handbook.
I
b.
Place
the
left
generator
switch,
located
on
the
pilot’s
subpanel,
in the
on
position.
CAUTION: Monitor
the
cylinder
head
temperature
indicator
to
prevent
overheating
of the
engine
due
to
inadequateair
cooling.
I
c.
Bring
the
voltage
regulator
and
generator
up
to
operating
temperature
by running
the
engine
for
at
least
20
minutes
at
minimum cruise
rpm
with
approximately
15
to
20
percent
electrical
load
as
indicated
on
the
respective
loadmeter,
located in the
center
section of
the instrument
panel.
CAUTION:
Do
not
use
the voltmeter
on
the
airplane
instrument
panel,
except
to
determine that
the
generator
isoperating.
I
d.
Using
a
portable
precision
voltmeter
(0-50
range,
1%
accuracy),
connect
the
POSITIVE
lead to
the
common
bus
terminal
and the
NEGATIVE
lead
to
structural
ground.
E21
SECTION
13
27